Theodor goetz



(ModeL) GASTER.

' No. 367,387. Patented Au .2',1837. I F iY Lgi.

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Arromvzm UNITED STATES PATENT OFFICE.

THEODOR GOETZ, OF NEW YORK, NVY.

CASTER.

SPECIFICATION forming part of Letters Patent No. 367,387, dated August2, 1887.

Application filed September 22, 1886. Serial No. 214,230. (Model) A witha socket, of a plate mounted to revolve on an axis in the socketparallel with the plane of the plate, and of two ha1f-balls mounted torevolve on pivots projecting from the plate at right angles, all as willbe fully described and set forth hereinafter, and finally pointed out isa sectional view'on the line w m, Fig. 2.

7 the edges of the recess.

Similar letters of reference indicate corresponding parts.

The socket A, which has an approximately semi-spherical recess, isfastened in any suitable manner to the bottom of the-leg B. In thesocket a transverse axis, 0, is secured near the bottom edge, which axispasses longitudinall y through a slot or aperture, 0, formed in thecircular plate D, said slot extending diametricallyacross the plate,thus adapting the plate to revolve on said axis 0. At the ends of saidslot 0 the plate D. is provided on its edges with the lugs E, as shownin Fig. 3, for the purpose of preventing the said plate from playing 011the axis 0 in the direction of the length of saidaxis, the ends of thesaid lugs resting against the insides of the socket nearv The plate D isprovided withtwo diametrically-opposite pivots, F, which are at rightangles to the axis 0, and on each pivot F a half-ball, H, is mounted torevolve, a suitable head being formed on the outer end of the pivot toprevent the half-ball Fig. 2 is from coming off. The inner ends of thepivots are preferably made conical for the purpose of strengthening thesame and preventing binding, corresponding recesses being formed in theinner sides of the half-balls. When the leg is moved in a line at rightangles to the axis 0, the plate D is revolved on the axis 0, and thehalf-balls revolve with it. When the leg is moved parallel with the axis0, the half-balls are revolved on their pivots the half-balls and theplate D are turned on the axis 0 until the pivots F have a greater orless inclination to said axis, and then that halfball incontact with'thefloor revolves on its pivot. As shown in Fig. 1', the half-plate nevercomes in contact with the floor, the diameter of the same being slightlyless than that of the half-ball.

The half-balls can be made of glass, rubber, wood, or metal, or anyother suitable material.

Washers J may be introduced between the' inner sides of the half-ballsand thesides of the plate D.

Having thus described my invention, Iclaim as new and desire to secureby Letters Patent- 'The combination, with a socket, of a fixed axis inthe same, a plate mounted to revolve on said axis, which plate isprovided with a slot through which the axis passes longitudinally, andsaid plate being provided withlugs at the ends of theslot, through whichthe axis passes, pivots projecting from the opposite sides of the plateat right angles to the axis,

which pivots are made conical, and of halfballs mounted on said pivots,the diameters of the balls being greater than that of the plate,substantially as shown and described.

In testimony that I claim the foregoing as my invention I have signed myname inpresence of two subscribing witnesses.

.THEODOR GOETZ.

Witnesses:

OsoAR F. GUNZ, SIDNEY lVIANN.

l When the leg is moved in a diagonal line,

